Success Stories of High-Performance QFN/DFN Frame Packaging Solutions

1、 Case Overview

This case demonstrates our company's breakthrough solution for the field of motor drive chips based on advanced high-performance QFN/DFN framework packaging technology. Through innovative heterogeneous integration packaging technology, 9 chips with different functions were successfully integrated into a QFN package with a size of only 6 × 6mm, achieving the ultimate miniaturization and high integration of motor drive systems. The product has a thickness of only 0.8mm, which significantly reduces the size of end products while maintaining excellent electrical performance, providing an ideal core solution for motor drive applications in multiple fields such as consumer electronics, smart homes, and automotive electronics.

2、 Industry background and customer challenges

With the rapid development of smart home, consumer electronics, and automotive electronics industries, the demand for miniaturization, lightweighting, high performance, and high reliability in terminal products is becoming increasingly urgent. The traditional motor drive system usually adopts a multi chip discrete solution, which has the following significant pain points:

Large space occupation: Stand up components such as MCU, MOS transistor, power management chip, and communication module require a large amount of PCB area, which severely limits the miniaturization design of terminal products

High system complexity: The wiring between multiple chips is complex, and signal interference issues are prominent, which increases the difficulty of design and manufacturing costs

Lack of reliability: There are many solder joints between discrete components, which can easily lead to connection failure in harsh environments such as vibration and temperature changes

Difficulty in balancing power consumption and performance: Discrete solutions have long signal transmission paths, high losses, and are difficult to achieve efficient energy conversion and precise motor control

To solve the above-mentioned industry challenges, customers urgently need an advanced packaging solution that can highly integrate multiple functional chips, significantly reduce the size of motor drive systems without sacrificing performance, improve system reliability, and reduce overall costs.

3、 Core content of the solution

In response to customer needs, our company has launched a customized QFN6 × 6 irregular packaging solution based on our deep technical accumulation in the field of QFN/DFN framework packaging. This solution adopts advanced System in Package (SiP) technology and successfully achieves integrated packaging of various types of chips through innovative chip layout design, high-density interconnect technology, and heterogeneous integration processes.

System architecture design

This solution integrates the following 9 chips with different functions into a single QFN package:

1 microcontroller (MCU) chip: responsible for the operation of motor control algorithms and overall system management

8 power MOSFET chips: providing high current driving capability to achieve efficient power conversion of motors

1 DC-DC power management chip: provides stable power supply for various modules of the system

1 Wi Fi communication chip: realizing wireless control and data transmission functions

1 LGA packaged dedicated chipset: integrated with multiple protection functions such as overcurrent, overheating, undervoltage, etc

Key process technology

High density framework design: QFN framework is made using high-precision etching technology, achieving pin spacing below 0.2mm and high-density pin layout

Multi chip stacking and tiling technology: By optimizing chip layout, chips of different sizes and functions are reasonably arranged in limited packaging space

Heterogeneous integration process: Successfully achieved mixed packaging of LGA chips and traditional bare chips, solving the interconnection problem between chips with different packaging forms

Ultra thin encapsulation technology: using low stress epoxy resin material and advanced molding process, achieving an ultra-thin encapsulation thickness of 0.8mm

High reliability soldering technology: using advanced reflow soldering technology to ensure reliable connections between multiple chips and between chips and frames

4、 Core Technology Highlights

Ultimate integration and miniaturization: Nine different types of chips are integrated in a small packaging area of 6 × 6mm, which increases integration by more than 80% compared to traditional discrete solutions. The overall thickness of the product is only 0.8mm, providing the possibility for ultra-thin design of end products.

Innovative heterogeneous packaging technology: For the first time, the heterogeneous integration of LGA chipset and MOS chip has been achieved in QFN framework packaging, perfectly integrating multiple functions such as control, power, communication, and protection into one, forming a complete ultra micro motor controller.

Excellent electrical performance: By optimizing internal wiring and signal integrity design, signal transmission loss and electromagnetic interference have been significantly reduced. The MOS chip adopts a low on resistance design, achieving efficient power conversion and effectively reducing system power consumption.

Comprehensive protection function: It integrates multiple protection mechanisms such as overcurrent protection, overheating protection, and undervoltage locking, which can quickly cut off the power supply in abnormal situations, effectively protecting the motor and drive chip from damage, greatly improving the reliability and service life of the system.

Excellent heat dissipation performance: QFN packaging itself has good heat dissipation characteristics. By optimizing chip layout and thermal design, it ensures that the chip temperature remains within a safe range under high current working conditions, ensuring the stable operation of the system.

5、 Application scenarios and value

This QFN6 × 6 irregular package motor driver chip is widely used in the following fields due to its advantages of miniaturization, high integration, high performance, and high reliability:

Smart home field

Sweeper main wheel drive: significantly reduces the size of the drive module, freeing up more space for batteries and other functional modules, improving the range and cleaning efficiency of the sweeper

Intelligent curtains and electric drying racks: achieving invisible design of the driving system, making the product appearance more concise and beautiful, while reducing operating noise

Smart lock: meets the strict requirements of miniaturization and low power consumption for smart locks, and enhances the security and reliability of smart locks

In the field of consumer electronics

Toy car and drone gimbal: providing precise speed control and steering control to enhance product handling and stability

Camera zoom motor and vibration motor: achieve high-precision position control and fast response, improve camera focusing speed and imaging quality

Portable electronic devices: providing efficient and compact driving solutions for small motors in various portable electronic devices

Automotive electronics field

Electric seats and window lift: meet the high reliability and wide temperature range requirements of automotive electronics, and operate stably within a temperature range of -40 ℃ to 125 ℃

Car refrigerator compressor and cooling fan: providing efficient power drive, reducing energy consumption, and improving the fuel economy of the car

Other applications of car motors: suitable for driving various car motors such as windshield wipers, rearview mirror adjustment, sunroof control, etc

6、 Customer revenue

Significantly reducing system costs: The integrated solution reduces PCB area, component quantity, and assembly processes, resulting in an overall system cost reduction of over 30% compared to traditional discrete solutions

Significantly shorten development cycle: Customers do not need to carry out complex multi chip system design and debugging, only need to directly apply this integrated chip to the product, which can shorten the product development cycle by 50%

Enhancing product competitiveness: The characteristics of miniaturization and high performance make customers' end products more competitive in the market and able to quickly respond to market demand

Improved product reliability: reduced the number of solder joints and external connections, lowered the risk of failure, and increased the mean time between failures (MTBF) of the product by more than twice

Simplified supply chain management: Customers only need to purchase a single integrated chip, without managing the supply chain of multiple discrete components, greatly reducing the complexity and cost of supply chain management

7、 Summary

The successful development and mass production of the QFN6 × 6 irregular packaging motor driver chip fully demonstrates our company's technical strength and innovation capability in the field of high-performance QFN/DFN framework packaging. This solution not only solves the contradiction between miniaturization and high performance of motor drive systems, but also provides valuable experience for multi chip integrated applications in other fields.

In the future, our company will continue to increase research and development investment in advanced packaging technology, continuously improve packaging integration and performance, and launch more customized packaging solutions that meet the needs of different industries. We will work hand in hand with our customers to promote the development of the electronics industry towards miniaturization, integration, and intelligence.